Water-heater.



No. 737,771. PATENTED SEPT. 1, 1903.

L. M. REHNQUISL WATER HEATER.

APPLIOATIONIILED JAN. 29. 1903.

R0 IODEL. 2 EHBETS- SEEET l.

m: uonms ymns cu, Pnovaumoj, WASHINGTON. a. c.

No. 737,771. PATENTED SEPT. l, 1903.

.L. M. REHNQUIST.

WATER HEATER.

APPLICATION Hum JAN. 29. 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

UNITED STATES Patented. September 1, 1903.

LAIVRENCE M. REHNQUIST, OF CHICAGO, ILLINOIS.

WATER-HEATER.

SPECIFICATION formingpart of Letters Patent No. 737,771, dated September 1, 1903.

Application filed January 29, 1903. Serial No. 141.031. (No model.)

T0 at whom it may concern:

Be it known that I, LAWRENCE M. REHN QUIST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Hot-Water Heater, of which the following is a specification.

The invention relates to improvements in hot-water heaters.

The object of the present invention is to improve the construction of hot-water heaters and to provide a simple, inexpensive, and efficient one designed for heating alarge number of apartments and adapted for the use of any kind of fuel and capable of affording a maximum heating efiect from a given quantity of fuel.

A further object of the invention is to provide a hot-water heater of this character in which it will be necessary to renew the supply of water only at considerable intervals and in which also air will be freely admitted to the fire-pot or combustionchamber for supporting combustion.

The invention also has for its object to provide a hot-water heater in which the hot-water coil may be arranged within the fire-pot without causing the same to be clogged with ashes, clinkers, and the like.

WVith these and other objects in view the invention consists in the novel construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the claims hereto appended, it being understood that changes in the form, proportion, and minor details of construction within the scope of the claims may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a vertical sectional View of a hot-water heater constructed in accordance with this invention. Fig. 2 is an elevation of the same. Fig. 3 is a horizontal sectional view on the line 3 3 of Fig. 1. Fig. 4 is a similar view on the line 4. 4 of Fig.

1. Fig. 5 is a sectional view of the lining of 1 designates a furnace provided with walls of brick or other suitable material which support a horizontally-disposed hot-water tank 2, extending across the upper portion of the furnace and having its ends embedded in the side of the masonry thereof, as clearly illusstrated in Fig. 1 of the accompanying drawings. The hot-water tank 2 has its front wall arranged adjacent to the front wall of the furnace, as clearly illustrated in Fig. 3 of the accompanying drawings, and its rear wall terminates short of the back of the furnace to provide an intervening space 3 to afford a passage-way for smoke and other products of combustion and to permit the same to pass upward to a pipe or flue 4., which leads to a chimney 5. The bottom of the hot water tank is pierced for the reception of the upper end 6 of a hot-water coil 7, which extends downward to within a short distance of a grate 8, and which has its lower portion arranged within the fire-pot of the furnace; The coil is rectangular in horizontal section or plan view, as shown in Fig. 3 of the drawings, and cold water or water from the return-pipes hereinafter described is fed to the lower end of the coil by a horizontal pipe 9, piercing the furnace at one of the side walls thereof at a point directly above the grate. The upper end of the coil is preferably threaded to engage corresponding screwthreads of the bottom of the hot-water tank, and suitable couplings are provided for connecting the members of the coil, as will be readily understood.

The grate, which may be of any desired construction, is rectangular, as shown in Fig. 4, and is provided with a central depending pivot 10, arranged in a suitable bearing or socket 11 of a support 12, consisting of a centrally-arranged transverse bar and an arm 13. The transverse bar forms laterally-extending arms, which with the rewardly-extending arm have their outer ends embedded in the masonry of the side and rear walls of the furnace. The arms of the support may be perforated for the reception of suitable fastening devices for anchoring them securely in the masonry of the furnace,.and the terminals of the arms may be deflected to form exterior lugs 14 for engaging the outer faces of the side and rear Walls of the furnace.

The grate 8, which is provided with a forwardly-extending arm 15, is adapted to be oscillated, and it is capable of being readily removed, as the depending pivot 10 is detachably fitted within the socket or bearing 11 of the support 12 and may be readily lifted out of the same.

The fire-pot of the furnace is provided with inclined linings 16, secured at their upper edges by bolts 17 or other suitablefastening devices to the Walls of the furnace and provided at their lower portions with supporting arms or braces 18, preferably formed integral with the lining and extending from the same to the inner faces of the walls of the furnace and adapted to brace and support the lower offset portions of the lining. An intervening space is thus formed between the lining and the walls of the furnace, and the lining is provided with openings 19, communicating with the said space and adapted to increase the draft. The inclined lining of the fire-pot also facilitates the removal of ashes by preventing the same from lodging in it. By this construction any character of fuel may be employed in the furnace and an increased draft is obtained. The lower portion of the coil is received within the fire-pot and the inclined members or sections of the coil are straight, and thereby greatly facilitate the removal of the ashes. The coil is suspended from and supported by the hotwater tank, and the lining is not subjected to the weight of the same. The tank may be provided at its lower face with depending projections 20, located at the inner faces of the side walls of the furnace and forming stops to prevent any endwise movement of the tank.

The lower horizontal pipe 9, which pierces the lower portion of the furnace at a point between the grate and the lining, is connected by an upright feed-pipe 21 with a reservoir 22, having a suitable gage 23 and designed to be supplied with Water by any suitable means, such as an ordinary service- -pipe 24; but water may be supplied to the tank in any other desired manner. An airescape pipe 25 is also connected with the reservoir to permit air contained within the same to escape when water is supplied to the reservoir. A suitable valve 26 is provided for closing the air-escape pipe, as clearly shown in Fig. 1, and a valve 27 is provided in the supply-pipe 21 to cut olf the flow of water from the reservoir when it is desired to clean out the coil and other pipes of the system. A discharge-pipe 28, having a suitable valve 29, is connected with the pipe 9, as shown, for enabling the water to be drawn off from the pipes of the hot-water heater, and

the service-pipe is also connected with the pipe 28, as shown, at apoint between the furnace and the valve 29.

The hot-water tank is pierced at the top by a plurality of feed-pipes or hot-water pipes 30, provided with suitable valves 31 and extending to radiators 32, designed to be located in rear of the washboards 33 of the apartments to' be heated, and any number of radiators of the desired size may be employed, as will be readily understood. The radiators consist of coils suitably supported in a space- 34 in rear of the washboard between the same and the wall, linings 35, of asbestos, being preferably arranged in front and in rear of the coils of the radiator; but the space may be lined at the top and bottom, if desired. The washboard is provided with upper and lower openings 36 and 37, the lower openings being adapted to admit air to the space in which the coils are arranged, and the upper openings are for the escape of the heated air. By this construction'a circulation of air is produced and cold air is taken from the floor and heated, so that the temperature at the floor will be as high as that at the ceiling. The radiator is connected by a return-pipe 39 with the upper pipe 21, which extends from the reservoir to the hotwater coil and which is connected at its lower end with the pipe 9, that pierces the lower portion of the furnace. The hot-water feedpipes are designed to pierce the walls of the furnace at different points, and a gage 40 and a safety-valve 41 are provided. The gage may be of any desired construction, and the safety-valve 41 is provided with a stem 42, guided in an opening of the disk or plate 43 and receiving a coiled spring 44, which is interposed between the disk or plate and the valve to retain the latter on the valve-seat. The tension of the spring is regulated by screws 45, extending through perforations of the disk or plate and having threaded portions engaging threaded perforations of ears or flanges 46. The heads of the screws engage the disk or plate 43, and they may be provided with grooves to enable them to be engaged by the blade of a screw-driver; but polygonal wrench-receiving heads may be employed. A washer or gasket 47, of rubber or other suitable material, is interposed between the valve and its seat, as indicated in Fig. 6 of the drawings, to provide a water and steam tight joint.

It will be seen that the hot-water heater is exceedingly simple and inexpensive in construction, that it possesses great strength and durability, and that the efficiency of such heating apparatus is greatly increased. It will also be clear that the furnace is designed for all kinds of material, such as wood and coal, that an increased draft is provided, and that ashes are prevented from lodging within the fire-pot and may be readily removed. Furthermore, the heating-coils are arranged in rear of the washboards and are adapted to maintain the temperature at the floor of a room as high as the temperature at the ceiling.

What I claim is- 1. In an apparatus of the class described, the combination of a furnace, a horizontal tank extending across the furnace above the IIO fire-pot and spaced from one of the walls of the furnace to provide a passage for the prodnets of combustion, said tank being embedded in and supported by the walls of the furnace and a smoke-pipe communicating with the furnace above the said tank, substantially as described.

2. In an apparatus of the class described, the combination of a furnace provided at the top with a smoke-pipe, a horizontal tank extending across the furnace above the fire-pot at a point between the same and the smokepipe and embedded in the walls of the furnace, said tank being spaced from one of the walls of the furnace to provide a passage for the products of combustion, and a coil depending from. and supported by the tank and extending into the fire-pot, substantially as described.

8. In an apparatus of the class described, the combination of a furnace, a horizontal tank extending across the furnace at a point above the fire-pot and having its ends partially embedded in the walls of the furnace, said tank being provided at the inner faces of the Walls with projections to prevent endwise movement of the tank, and a coil depending from and supported by the tank, substantially as described.

the top with a smoke-pipe and having a firepot lining at the lower portion, of a tank embedded in the walls of the furnace at a point between the fire-pot lining and the smokepipe and spaced from one of the walls of the furnace to provide passage for the products of combustion, and a coil depending from the tank and extending into the fire-pot lining, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

LAWRENCE M. REHNQUIST.

Witnesses:

ALEXANDER WHITE, OSCAR NoRnsTRoM. 

